Noise-induced hearing loss is a very typical occupational disease. In fact, it is one of the most common and widespread of occupationally-related impairments. This tutorial will help clinicians understand the components of a hearing impairment and the techniques for rating an impairment in accordance with the Guides to the Evaluation of Permanent Impairment. Additional information may be found in chapter 9 of the Guides.

A hearing impairment evaluation is derived from a pure-tone audiogram and is always based on the functioning of both ears even though the hearing loss may be present only in one ear. This method is used only in adults with language skills. It is important to remove an examinee's hearing aids or other prosthetic devices before testing.

Impairment evaluation measures permanent loss. Examiners should be aware that hearing can be temporarily impaired...

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